Refer to the exhibit. If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1?
open the header and use it to determine whether the data is to be sent out S0/0/0
remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0
nothing, because the router has a route to the destination network
open the header and replace the destination MAC address with a new one